living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Nemertea Schultze, 1851 - ribbon worms
           Class Enopla Schultze, 1851
             Order Hoplonemertea Hubrecht, 1879
               Suborder Monostilifera Brinkmann, 1917
                 Family Emplectonematidae Bürger, 1904
                   1 Genus Emplectonemaᵀ Stimpson, 1857
                   2 Genus Paranemertes Coe, 1901
                   3 Genus Nemertes
                   4 Genus Nemertopsis Bürger, 1895
                   5 Genus Nemertopsella Wheeler, 1940
                   6 Genus Dichonemertes Coe, 1938
                   7 ?Genus Atyponemertes Friedrich, 1938
                   8 ?Genus Coenemertes
                   9 ?Genus Poikilonemertes Stiasny-Wijnhoff, 1942